include/asm-ppc64/rtas.h

   1 #ifndef _PPC64_RTAS_H
   2 #define _PPC64_RTAS_H
   3
   4 #include <linux/spinlock.h>
   5 #include <asm/page.h>
   6
   7 /*
   8  * Definitions for talking to the RTAS on CHRP machines.
   9  *
  10  * Copyright (C) 2001 Peter Bergner
  11  * Copyright (C) 2001 PPC 64 Team, IBM Corp
  12  *
  13  * This program is free software; you can redistribute it and/or
  14  * modify it under the terms of the GNU General Public License
  15  * as published by the Free Software Foundation; either version
  16  * 2 of the License, or (at your option) any later version.
  17  */
  18
  19 #define RTAS_UNKNOWN_SERVICE (-1)
  20 #define RTAS_INSTANTIATE_MAX (1UL<<30) /* Don't instantiate rtas at/above this value */
  21
  22 /* Buffer size for ppc_rtas system call. */
  23 #define RTAS_RMOBUF_MAX (64 * 1024)
  24
  25 /* RTAS return status codes */
  26 #define RTAS_BUSY               -2    /* RTAS Busy */
  27 #define RTAS_EXTENDED_DELAY_MIN 9900
  28 #define RTAS_EXTENDED_DELAY_MAX 9905
  29
  30 /*
  31  * In general to call RTAS use rtas_token("string") to lookup
  32  * an RTAS token for the given string (e.g. "event-scan").
  33  * To actually perform the call use
  34  *    ret = rtas_call(token, n_in, n_out, ...)
  35  * Where n_in is the number of input parameters and
  36  *       n_out is the number of output parameters
  37  *
  38  * If the "string" is invalid on this system, RTAS_UNKNOWN_SERVICE
  39  * will be returned as a token.  rtas_call() does look for this
  40  * token and error out gracefully so rtas_call(rtas_token("str"), ...)
  41  * may be safely used for one-shot calls to RTAS.
  42  *
  43  */
  44
  45 typedef u32 rtas_arg_t;
  46
  47 struct rtas_args {
  48         u32 token;
  49         u32 nargs;
  50         u32 nret;
  51         rtas_arg_t args[16];
  52         rtas_arg_t *rets;     /* Pointer to return values in args[]. */
  53 };
  54
  55 extern struct rtas_args rtas_stop_self_args;
  56
  57 struct rtas_t {
  58         unsigned long entry;            /* physical address pointer */
  59         unsigned long base;             /* physical address pointer */
  60         unsigned long size;
  61         spinlock_t lock;
  62         struct rtas_args args;
  63         struct device_node *dev;        /* virtual address pointer */
  64 };
  65
  66 /* RTAS event classes */
  67 #define RTAS_INTERNAL_ERROR             0x80000000 /* set bit 0 */
  68 #define RTAS_EPOW_WARNING               0x40000000 /* set bit 1 */
  69 #define RTAS_POWERMGM_EVENTS            0x20000000 /* set bit 2 */
  70 #define RTAS_HOTPLUG_EVENTS             0x10000000 /* set bit 3 */
  71 #define RTAS_EVENT_SCAN_ALL_EVENTS      0xf0000000
  72
  73 /* RTAS event severity */
  74 #define RTAS_SEVERITY_FATAL             0x5
  75 #define RTAS_SEVERITY_ERROR             0x4
  76 #define RTAS_SEVERITY_ERROR_SYNC        0x3
  77 #define RTAS_SEVERITY_WARNING           0x2
  78 #define RTAS_SEVERITY_EVENT             0x1
  79 #define RTAS_SEVERITY_NO_ERROR          0x0
  80
  81 /* RTAS event disposition */
  82 #define RTAS_DISP_FULLY_RECOVERED       0x0
  83 #define RTAS_DISP_LIMITED_RECOVERY      0x1
  84 #define RTAS_DISP_NOT_RECOVERED         0x2
  85
  86 /* RTAS event initiator */
  87 #define RTAS_INITIATOR_UNKNOWN          0x0
  88 #define RTAS_INITIATOR_CPU              0x1
  89 #define RTAS_INITIATOR_PCI              0x2
  90 #define RTAS_INITIATOR_ISA              0x3
  91 #define RTAS_INITIATOR_MEMORY           0x4
  92 #define RTAS_INITIATOR_POWERMGM         0x5
  93
  94 /* RTAS event target */
  95 #define RTAS_TARGET_UNKNOWN             0x0
  96 #define RTAS_TARGET_CPU                 0x1
  97 #define RTAS_TARGET_PCI                 0x2
  98 #define RTAS_TARGET_ISA                 0x3
  99 #define RTAS_TARGET_MEMORY              0x4
 100 #define RTAS_TARGET_POWERMGM            0x5
 101
 102 /* RTAS event type */
 103 #define RTAS_TYPE_RETRY                 0x01
 104 #define RTAS_TYPE_TCE_ERR               0x02
 105 #define RTAS_TYPE_INTERN_DEV_FAIL       0x03
 106 #define RTAS_TYPE_TIMEOUT               0x04
 107 #define RTAS_TYPE_DATA_PARITY           0x05
 108 #define RTAS_TYPE_ADDR_PARITY           0x06
 109 #define RTAS_TYPE_CACHE_PARITY          0x07
 110 #define RTAS_TYPE_ADDR_INVALID          0x08
 111 #define RTAS_TYPE_ECC_UNCORR            0x09
 112 #define RTAS_TYPE_ECC_CORR              0x0a
 113 #define RTAS_TYPE_EPOW                  0x40
 114 #define RTAS_TYPE_PLATFORM              0xE0
 115 #define RTAS_TYPE_IO                    0xE1
 116 #define RTAS_TYPE_INFO                  0xE2
 117 #define RTAS_TYPE_DEALLOC               0xE3
 118 #define RTAS_TYPE_DUMP                  0xE4
 119 /* I don't add PowerMGM events right now, this is a different topic */
 120 #define RTAS_TYPE_PMGM_POWER_SW_ON      0x60
 121 #define RTAS_TYPE_PMGM_POWER_SW_OFF     0x61
 122 #define RTAS_TYPE_PMGM_LID_OPEN         0x62
 123 #define RTAS_TYPE_PMGM_LID_CLOSE        0x63
 124 #define RTAS_TYPE_PMGM_SLEEP_BTN        0x64
 125 #define RTAS_TYPE_PMGM_WAKE_BTN         0x65
 126 #define RTAS_TYPE_PMGM_BATTERY_WARN     0x66
 127 #define RTAS_TYPE_PMGM_BATTERY_CRIT     0x67
 128 #define RTAS_TYPE_PMGM_SWITCH_TO_BAT    0x68
 129 #define RTAS_TYPE_PMGM_SWITCH_TO_AC     0x69
 130 #define RTAS_TYPE_PMGM_KBD_OR_MOUSE     0x6a
 131 #define RTAS_TYPE_PMGM_ENCLOS_OPEN      0x6b
 132 #define RTAS_TYPE_PMGM_ENCLOS_CLOSED    0x6c
 133 #define RTAS_TYPE_PMGM_RING_INDICATE    0x6d
 134 #define RTAS_TYPE_PMGM_LAN_ATTENTION    0x6e
 135 #define RTAS_TYPE_PMGM_TIME_ALARM       0x6f
 136 #define RTAS_TYPE_PMGM_CONFIG_CHANGE    0x70
 137 #define RTAS_TYPE_PMGM_SERVICE_PROC     0x71
 138
 139 struct rtas_error_log {
 140         unsigned long version:8;                /* Architectural version */
 141         unsigned long severity:3;               /* Severity level of error */
 142         unsigned long disposition:2;            /* Degree of recovery */
 143         unsigned long extended:1;               /* extended log present? */
 144         unsigned long /* reserved */ :2;        /* Reserved for future use */
 145         unsigned long initiator:4;              /* Initiator of event */
 146         unsigned long target:4;                 /* Target of failed operation */
 147         unsigned long type:8;                   /* General event or error*/
 148         unsigned long extended_log_length:32;   /* length in bytes */
 149         unsigned char buffer[1];
 150 };
 151
 152 struct flash_block {
 153         char *data;
 154         unsigned long length;
 155 };
 156
 157 /* This struct is very similar but not identical to
 158  * that needed by the rtas flash update.
 159  * All we need to do for rtas is rewrite num_blocks
 160  * into a version/length and translate the pointers
 161  * to absolute.
 162  */
 163 #define FLASH_BLOCKS_PER_NODE ((PAGE_SIZE - 16) / sizeof(struct flash_block))
 164 struct flash_block_list {
 165         unsigned long num_blocks;
 166         struct flash_block_list *next;
 167         struct flash_block blocks[FLASH_BLOCKS_PER_NODE];
 168 };
 169 struct flash_block_list_header { /* just the header of flash_block_list */
 170         unsigned long num_blocks;
 171         struct flash_block_list *next;
 172 };
 173 extern struct flash_block_list_header rtas_firmware_flash_list;
 174
 175 extern struct rtas_t rtas;
 176
 177 extern void enter_rtas(unsigned long);
 178 extern int rtas_token(const char *service);
 179 extern int rtas_call(int token, int, int, int *, ...);
 180 extern void call_rtas_display_status(unsigned char);
 181 extern void rtas_restart(char *cmd);
 182 extern void rtas_power_off(void);
 183 extern void rtas_halt(void);
 184 extern void rtas_os_term(char *str);
 185 extern int rtas_get_sensor(int sensor, int index, int *state);
 186 extern int rtas_get_power_level(int powerdomain, int *level);
 187 extern int rtas_set_power_level(int powerdomain, int level, int *setlevel);
 188 extern int rtas_set_indicator(int indicator, int index, int new_value);
 189 extern void rtas_initialize(void);
 190
 191 /* Given an RTAS status code of 9900..9905 compute the hinted delay */
 192 unsigned int rtas_extended_busy_delay_time(int status);
 193 static inline int rtas_is_extended_busy(int status)
 194 {
 195         return status >= 9900 && status <= 9909;
 196 }
 197
 198 extern void pSeries_log_error(char *buf, unsigned int err_type, int fatal);
 199
 200 /* Error types logged.  */
 201 #define ERR_FLAG_ALREADY_LOGGED 0x0
 202 #define ERR_FLAG_BOOT           0x1     /* log was pulled from NVRAM on boot */
 203 #define ERR_TYPE_RTAS_LOG       0x2     /* from rtas event-scan */
 204 #define ERR_TYPE_KERNEL_PANIC   0x4     /* from panic() */
 205
 206 /* All the types and not flags */
 207 #define ERR_TYPE_MASK   (ERR_TYPE_RTAS_LOG | ERR_TYPE_KERNEL_PANIC)
 208
 209 #define RTAS_DEBUG KERN_DEBUG "RTAS: "
 210
 211 #define RTAS_ERROR_LOG_MAX 2048
 212
 213 /*
 214  * Return the firmware-specified size of the error log buffer
 215  *  for all rtas calls that require an error buffer argument.
 216  *  This includes 'check-exception' and 'rtas-last-error'.
 217  */
 218 extern int rtas_get_error_log_max(void);
 219
 220 /* Event Scan Parameters */
 221 #define EVENT_SCAN_ALL_EVENTS   0xf0000000
 222 #define SURVEILLANCE_TOKEN      9000
 223 #define LOG_NUMBER              64              /* must be a power of two */
 224 #define LOG_NUMBER_MASK         (LOG_NUMBER-1)
 225
 226 /* Some RTAS ops require a data buffer and that buffer must be < 4G.
 227  * Rather than having a memory allocator, just use this buffer
 228  * (get the lock first), make the RTAS call.  Copy the data instead
 229  * of holding the buffer for long.
 230  */
 231
 232 #define RTAS_DATA_BUF_SIZE 4096
 233 extern spinlock_t rtas_data_buf_lock;
 234 extern char rtas_data_buf[RTAS_DATA_BUF_SIZE];
 235
 236 extern void rtas_stop_self(void);
 237
 238 /* RMO buffer reserved for user-space RTAS use */
 239 extern unsigned long rtas_rmo_buf;
 240
 241 #define GLOBAL_INTERRUPT_QUEUE 9005
 242
 243 #endif /* _PPC64_RTAS_H */